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The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Common name: Mudpuppy

Taxonomy: available through www.itis.gov

Size: generally 20 - 33 cm

Native Range: Sporadically distributed from the southeastern U.S. north to New York, Vermont and Quebec and west to North Dakota and Manitoba.

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Ecology: Found in clear lakes, rivers and streams, and some weedy, turbid and mud-banked streams.  It lingers in shallow aquatic habitats under rocks and logs and swims deep in lakes on occasion.  Primarily nocturnal, but is known to venture out during daytime in cloudy or sheltered water.  Females construct underwater nests and lay up to 100 eggs (average 48-60) during May and June.

Means of Introduction: The New England populations are releases or escapes from college biology programs.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

References: (click for full references)

Reigle, N. J., Jr. 1967.  The occurrence of Necturus in deeper waters of Green Bay.  Herpetologica 23:232-233.

Author: McKercher, E.

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.